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How do red giants become white dwarfs?

Answer 1

At some point in the red giant's life, the last of the helium atoms in its core is fused into carbon atoms. The star begins to die. Without nuclear fusion taking place in its core, the star slowly cools and fades. Finally gravity causes the last of the star's matter to collapse inward. The matter is squeezed so tightly that the star becomes a tiny white dwarf .

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Answer 2

Levi Acosta

A process known as stellar evolution turns red giants into white dwarfs. When a red giant runs out of nuclear fuel, it sheds its outer layers and forms a planetary nebula. The remaining core of the red giant, which is primarily made of carbon and oxygen, collapses under the force of gravity to become a white dwarf.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.